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import std/[sequtils,strutils]
proc digital_clock(str:string):int =
var s = toSeq(str)
if s[0] == '?':
if parseInt($s[1]) < 4: return 2 else: return 1
elif s[1] == '?':
if parseInt($s[0]) < 2: return 9 else: return 3
elif s[3] == '?': return 5 else: return 9
echo digital_clock("?5:00")
echo digital_clock("?3:00")
echo digital_clock("1?:00")
echo digital_clock("2?:00")
echo digital_clock("12:?5")
echo digital_clock("12:5?")
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